The drop forging steel plate lifted heavy objects the pliers use “the low-carbon high quality alloy steel” forging to become, had guaranteed this kind of tool's anti-impact ability, bearing capacity, toughness and the extensibility, enhanced this kind of product safety performance and the service life greatly. The steel wrench is widely applied in work situations and so on steel structure installment, steel products market, steel plate cutting, steel plate level transporting and vertical transporting.